Running kernel 4.4.4 is no good.. with the same setup as above but only changing out vmlinuz and initrd.img, I run into a kernel panic. "Kernel panic - not syncing: attempted to kill init!" There was an error that I hadn't seen before about "systemd-udevd: could not open builtin file /lib/modules/4.4.4/modules.builtin.bin". Before the kernel panic, I got the same "device not accepting address, error -110" as I did on 3.19. To focus on the problem at hand, should I be using kernel 3.19 source configured with the options above? On Fri, Mar 4, 2016 at 4:47 PM, Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote: > On Fri, 4 Mar 2016, Devon Ash wrote: > >> Failing that, can you at least provide a usbmon trace showing what >> happens when you plug a device into one of the bad ports? >> >> usbmon trace: >> >> I'm unable to get anything from doing "cat 0u && cat 5u && cat 6u" >> (which are all of the offending devices locations) > > Is CONFIG_USB_MON set? If it is set to M, have you loaded the usbmon > module? > >> And also a >> dmesg log with USB debugging enabled? >> >> dmesg shows nothing. I htink I'm missing something - to enable USB >> debugging all that needs to be done is mount the debugfs right? > > No, that's not enough. I don't remember how 3.19 does it, but with > more modern kernels you have to enable dynamic debugging by doing: > > echo 'module usbcore =p' >/sys/kernel/debug/dynamic_debug/control > > That's assuming CONFIG_DYNAMIC_DEBUG is set, which it should be in a > typical distribution kernel. > >> Regarding Kernel 4.2.0-30-lowlatency, >> >> system-udevd is now giving me the outputs on boot: >> >> seq 1106 '/devices/pci0000:00/0000:00:1a.0/usb5 killed (same for usb6) >> reason being ; a timeout >> >> Then I start to get >> >> usb 5-1: device not accepting address 5, error -110 >> usb usb5-port1; unable to enumerate USB device >> >> and the same for usb6. >> >> There is also: >> >> system-udevd: worker terminated by signal 9, and then the system waits >> for 2-5 minutes, finishing with a kernel hang and a stack trace "not >> tainted, blocked for more than 120 seconds" > > Can you post the actual dmesg log? > >> here is the output of: >> >> sudo mount -t usbfs none /proc/bus/usb >> >> mount: mounting none on /proc/bus/usb failed: no such file or directory > > There no longer is any such thing as a usbfs filesystem. Instead > there are USB device nodes under /dev/bus/usb. > >> cat /proc/bus/usb/devices: no such file or directory >> >> sudo mount -t debugfs none /sys/kernel/debug >> >> mount: muonting none on /sys/kernel/debug failed: Device or resource busy > > Probably because it's already mounted there. > >> As well, all usbmon outputs are returning me nothing when plugging >> in/out the broken USB ports that are in question > > What is the full path of the files you are watching for usbmon? They > should be things like /sys/kernel/debug/usb/usbmon/5u -- which of > course won't exist unless debugfs is properly mounted and usbmon is > properly loaded. > > Alan Stern > -- Devon Ash <a href="http://ca.linkedin.com/pub/devon-ash/48/478/981"; style="text-decoration:none;"><span style="font: 80% Arial,sans-serif; color:#0783B6;"><img src="https://static.licdn.com/scds/common/u/img/webpromo/btn_in_20x15.png"; width="20" height="15" alt="View Devon Ash's LinkedIn profile" style="vertical-align:middle" border="0">View Devon Ash's profile</span></a> -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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